| Parameter |
Value |
| Designation |
234P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-12-22T16:26:47.500800Z |
| Orbit solution date (soln_date, UTC) |
2025-07-07T14:12:30Z |
| Obs used |
377 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
22.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-04-28.0000000 |
| e |
0.25077789 |
| q (au) |
2.858038 |
| a (au) |
3.814674 |
| i (deg) |
11.516795 |
| Ω (om, deg) |
179.719928 |
| ω (w, deg) |
358.128979 |
| M (ma, deg) |
113.411811 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.435 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.435 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.675 |
| k |
0.800 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
19:07:34.40 |
-08:18:25.5 |
HIP 93972 |
28.33 |
| 2026-07-29 12:00 |
19:07:17.27 |
-08:20:02.1 |
HIP 93972 |
31.11 |
| 2026-07-30 00:00 |
19:07:00.28 |
-08:21:39.4 |
HIP 93972 |
34.26 |
| 2026-07-30 12:00 |
19:06:43.45 |
-08:23:17.4 |
HIP 93709 |
31.34 |
| 2026-07-31 00:00 |
19:06:26.77 |
-08:24:55.9 |
HIP 93702 |
27.82 |
| 2026-07-31 12:00 |
19:06:10.25 |
-08:26:35.1 |
HIP 93702 |
23.47 |
| 2026-08-01 00:00 |
19:05:53.89 |
-08:28:14.8 |
HIP 93702 |
19.18 |
| 2026-08-01 12:00 |
19:05:37.69 |
-08:29:55.2 |
HIP 93702 |
14.96 |
| 2026-08-02 00:00 |
19:05:21.66 |
-08:31:36.1 |
HIP 93702 |
10.85 |
| 2026-08-02 12:00 |
19:05:05.80 |
-08:33:17.5 |
HIP 93702 |
7.00 |
| 2026-08-03 00:00 |
19:04:50.11 |
-08:34:59.5 |
HIP 93702 |
4.08 |
| 2026-08-03 12:00 |
19:04:34.59 |
-08:36:42.0 |
HIP 93702 |
4.45 |
| 2026-08-04 00:00 |
19:04:19.25 |
-08:38:24.9 |
HIP 93702 |
7.59 |
| 2026-08-04 12:00 |
19:04:04.09 |
-08:40:08.4 |
HIP 93702 |
11.36 |
| 2026-08-05 00:00 |
19:03:49.11 |
-08:41:52.4 |
HIP 93702 |
15.27 |
| 2026-08-05 12:00 |
19:03:34.32 |
-08:43:36.8 |
HIP 93504 |
18.88 |
| 2026-08-06 00:00 |
19:03:19.71 |
-08:45:21.7 |
HIP 93504 |
15.02 |
| 2026-08-06 12:00 |
19:03:05.29 |
-08:47:07.0 |
HIP 93504 |
11.28 |
| 2026-08-07 00:00 |
19:02:51.06 |
-08:48:52.7 |
HIP 93504 |
7.80 |
| 2026-08-07 12:00 |
19:02:37.03 |
-08:50:38.8 |
HIP 93504 |
5.02 |
| 2026-08-08 00:00 |
19:02:23.20 |
-08:52:25.4 |
HIP 93504 |
4.43 |
| 2026-08-08 12:00 |
19:02:09.56 |
-08:54:12.3 |
HIP 93504 |
6.56 |
| 2026-08-09 00:00 |
19:01:56.13 |
-08:55:59.5 |
HIP 93504 |
9.72 |
| 2026-08-09 12:00 |
19:01:42.90 |
-08:57:47.1 |
HIP 93504 |
13.15 |
| 2026-08-10 00:00 |
19:01:29.87 |
-08:59:35.0 |
HIP 93504 |
16.66 |
| 2026-08-10 12:00 |
19:01:17.06 |
-09:01:23.3 |
HIP 93504 |
20.19 |
| 2026-08-11 00:00 |
19:01:04.46 |
-09:03:11.8 |
HIP 93504 |
23.70 |
| 2026-08-11 12:00 |
19:00:52.07 |
-09:05:00.6 |
HIP 93208 |
26.64 |
| 2026-08-12 00:00 |
19:00:39.89 |
-09:06:49.7 |
HIP 93208 |
24.32 |
| 2026-08-12 12:00 |
19:00:27.94 |
-09:08:39.1 |
HIP 93208 |
22.38 |
| 2026-08-13 00:00 |
19:00:16.20 |
-09:10:28.7 |
HIP 93208 |
20.87 |
| 2026-08-13 12:00 |
19:00:04.68 |
-09:12:18.5 |
HIP 93208 |
19.90 |
| 2026-08-14 00:00 |
18:59:53.39 |
-09:14:08.5 |
HIP 93208 |
19.50 |
| 2026-08-14 12:00 |
18:59:42.32 |
-09:15:58.7 |
HIP 93208 |
19.70 |
| 2026-08-15 00:00 |
18:59:31.48 |
-09:17:49.1 |
HIP 93208 |
20.45 |
| 2026-08-15 12:00 |
18:59:20.87 |
-09:19:39.6 |
HIP 93208 |
21.68 |
| 2026-08-16 00:00 |
18:59:10.49 |
-09:21:30.3 |
HIP 93208 |
23.29 |
| 2026-08-16 12:00 |
18:59:00.34 |
-09:23:21.1 |
HIP 93208 |
25.19 |
| 2026-08-17 00:00 |
18:58:50.42 |
-09:25:12.1 |
HIP 93208 |
27.31 |
| 2026-08-17 12:00 |
18:58:40.74 |
-09:27:03.1 |
HIP 93208 |
29.58 |
| 2026-08-18 00:00 |
18:58:31.29 |
-09:28:54.2 |
HIP 93208 |
31.97 |
| 2026-08-18 12:00 |
18:58:22.08 |
-09:30:45.4 |
HIP 93076 |
32.29 |
| 2026-08-19 00:00 |
18:58:13.10 |
-09:32:36.7 |
HIP 93076 |
29.81 |